The ratio of S.I.unit and C.G.S unit of plank's constant to is

 S.I unit of plank's constant is  Joule sec = Kg m² s^-1       

C.G.S unit of plank's constant is erg sec = gm cm² s^-1

$\frac{Kg m^2{s}^{-1}}{gm c{m}^2 s^{-1}}=\frac{{10}^{3}gm{10}^{4}c{m}^2{s}^{-1}}{gm c{m}^2{s}^{-1}}={10}^7$